By partnering cameras and sensors, the city is able to manipulate traffic signals.

“There are sensors in the pavement that are counting traffic volumes in every lane, on every approach to every intersection, at every signal," Herndon said. "We plug that traffic-volume data into a software program, and that gives us the most optimal signal timing plan."

Drivers also can sign up to receive text or email alerts.

The system cost the city $15 million. It was paid for in part by grant money.

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